hygienics

例句：

1. 1. The city has implemented strict hygiene measures to prevent the spread of disease.
   该市实施了严格的卫生措施以防止疾病传播。
2. 2. Understanding the principles of hygiene is crucial for maintaining good health.
   理解卫生原则对于保持健康至关重要。
3. 3. The government has launched a campaign to promote hygiene and cleanliness in public places.
   政府启动了一个运动，以提高公共场所的卫生和清洁度。